US Pat. No. 9,538,679

POWER TRANSMISSION STRUCTURE OF POWER SUPPLY UNIT

CHYNG HONG ELECTRONIC CO....

1. A power transmission structure of a power supply unit, the power supply unit having a case, the power transmission structure
comprising:
a base plate, the base plate being made of an insulation material and disposed at an inner wall of the case;
a positioning plate, the positioning plate being made of an insulation material, the positioning plate being parallel to the
base plate and disposed on the base plate, the positioning plate being formed with a plurality of through troughs, the through
troughs being spaced and parallel to each other;

a plurality of metallic plates, the metallic plates being located in the through troughs of the positioning plate, one end
of each metallic plate being provided with a first connecting portion, the first connecting portion perpendicularly extending
out of the positioning plate, another end of each metallic plate being provided with a second connecting portion, the second
connecting portion perpendicularly extending out of the positioning plate;

a press plate, the press plate being made of an insulation material, the press plate being parallel to the metallic plates
and disposed on the metallic plates, the first connecting portions and the second connecting portions of the metallic plates
extending out of the press plate; and

a fixing plate, the fixing plate being disposed on the press plate, the fixing plate having a width greater than that of the
press plate, two sides of the fixing plate being provided with lip portions, the fixing plate being formed with an accommodation
space between the lip portions for accommodating the press plate, the positioning plate and the base plate, the lip portions
being formed with a plurality of spaced locking holes, the fixing board being locked to the inner wall of the case via a plurality
of locking members.

US Pat. No. 9,287,769

SYNCHRONIZING CIRCUITRY FOR AC-DC SWITCH MODE POWER SUPPLIES

CHYNG HONG ELECTRONIC CO....

1. A synchronizing circuitry for AC-DC switch mode power supplies, the synchronizing circuitry comprising:
a master control circuit, having a first controller for controlling a switching frequency of a master power source, the first
controller being connected to a first selector switch for selectively performing master-slave synchronous control, the first
selector switch being further connected to a first connecting port and a second connecting port;

at least one slave control circuit, having a second controller for controlling a switching frequency of a salve power source,
the second controller being connected to a second selector switch for selectively performing master-slave synchronous control,
the second selector switch being further connected to a third connecting port and a fourth connecting port;

at least one communication interface, spanning between the first connecting port of the master control circuit and the fourth
connecting port of the slave control circuit;

whereby, as the communication interface connects the master control circuit and the slave control circuit, when the first
selector switch and the second selector switch both select to perform master-slave control, the first controller works on
the switching frequencies in the power supplies for synchronous control, and the master control circuit establishes synchronous
connection with the slave control circuit, thereby achieving master-slave synchronous control.

US Pat. No. 9,489,011

REAL-TIME-CALIBRATION CIRCUIT FOR MULTIPLE CPUS

CHYNG HONG ELECTRONIC CO....

1. A real-time-calibration circuit for multiple CPUs, the real-time-calibration circuit comprising:
an external real-time clock, being connected with and alternatively powered by a battery;
a first CPU acting for communication when connected with an external network for communication, wherein the first CPU is connected
with the external real-time clock and includes a first real-time clock built therein;

a second CPU acting for control, wherein the second CPU is connected with the first CPU and includes a second real-time clock
built therein; and

a third CPU acting as a panel board, wherein the third CPU is connected with the first CPU and includes a third real-time
clock built therein;

whereby, after the first CPU obtains a standard time from the external network and sends the standard time to the external
real-time clock for time calibration, the external real-time clock sends a calibration value back to the first CPU so that
the first CPU performs time calibration on the first real-time clock built therein, and sends the calibration value to the
second real-time clock and the third real-time clock for time calibration.

US Pat. No. 9,240,730

POWER CIRCUIT OF AN AC POWER SUPPLY WITH AN ADJUSTABLE DC VOLTAGE REGULATION CIRCUIT

CHYNG HONG ELECTRONIC CO....

1. A power circuit of an AC power supply comprising:
a power input unit externally connected to an AC power, thereby supplying an AC voltage from an outside;
an AC/DC converter connected to said power input unit for converting said AC voltage input from said power input unit into
a DC voltage output via a filter and rectification;

an DC/DC circuit connected to said AC/DC converter for providing a full-wave rectified DC voltage which is formed by transforming
a voltage level of said DC voltage output from said AC/DC converter;

an adjustable DC voltage regulation circuit connected to said DC/DC circuit for regulating and stabilizing said voltage level
of said DC voltage output from said DC/DC circuit;

an amplifier connected to said adjustable DC voltage regulation circuit for amplifying and converting said DC voltage output
from said adjustable DC voltage regulation circuit into an AC voltage; said adjustable DC voltage regulation circuit being
a step-down converter;

a primary side circuit connected to a transformer; said transformer is further connected to a secondary side circuit; said
adjustable DC voltage regulation circuit adjusting different outputs of DC voltages under a condition of not switching off
to allow DC voltages to be converted into different AC voltage; said AC power supply power circuit outputting different AC
voltages; and said AC power supply power circuit adjusting voltages via cross position without interrupting output, switching
a power level promptly, and reaching a very low distortion thereof; and

said adjustable DC voltage regulation circuit is a constant voltage regulation; when said AC voltage output from said amplifier
is a high-voltage over 150 volts, said adjustable DC voltage regulation circuit is in a position of high-voltage power supply;
when said AC voltage output from said amplifier is a low-voltage less than 150 volts, said adjustable DC voltage regulation
circuit is in a position of low-voltage power supply.

US Pat. No. 10,143,117

HIGH POWER DENSITY DC-AC POWER INVERTER

CHYNG HONG ELECTRONIC CO....

1. A high power density DC-AC power inverter, mounted to a rack, the high power density DC-AC power inverter comprising: a casing, corresponding in size to the rack and having a rectangular shape, a front side of the casing being formed with a plurality of air inlets, a rear side of the casing being formed with a plurality of air outlets, a bottom of the casing being provided with a bottom plate; a fan unit, disposed at one side of the casing, for guiding outside cold air to enter the casing via the air inlets and discharge to the outside via the air outlets in a guide direction; a heat sink, disposed in the casing, the heat sink including a plurality of spaced fins, the fins each having a long side parallel to the guide direction; a plurality of power elements, each having a heat dissipation surface, the heat dissipation surfaces of the power elements being laterally attached to the heat sink; a circuit board module, laterally disposed above the heat sink and electrically connected with the power elements; when the power inverter is actuated, the power elements generate heat and the heat is conducted to the fins of the heat sink via a shortest route, the fan unit guides the outside cold air into the casing via the air inlets of the casing to pass through the fins of the heat sink for heat dissipation, and the heat is expelled out of the casing via the air outlets of the casing; a wind scooper disposed in the casing, the wind scooper being located between the fan unit and the heat sink, the wind scooper having a guide entrance adjacent to the fan unit and a guide exit adjacent to the heat sink for guiding the outside air from the air inlets to the fins of the heat sink, the wind scooper further having a plurality of guide holes adjacent to the power elements, the guide holes being located above the heat sink, the guide entrance of the wind scooper being greater than the guide exit and the guide holes, the guide exit being greater than the guide holes; and a choke coil module disposed in the casing, the choke coil module including a retainer, the retainer including an upper plate and a lower plate which are laterally disposed, the lower plate being fixed to a bottom of the casing.

US Pat. No. 9,621,066

MASTER/SLAVE CONTROL SYSTEM OF AC/DC POWER SUPPLY

CHYNG HONG ELECTRONIC CO....

1. A master/slave control system comprising:
a master device;
the master device supplying AC and DC power;
the master device comprising a control unit, an operation panel and a local area network port;
the operation panel of the master device being connected with the control unit of the master device;
the local area network port of the master device being connected with the control unit of the master device;
a slave device;
the slave device supplying AC and DC power;
the AC and DC power supplied by the master device and the AC and DC power supplied by the slave device being independent from
each other;

the slave device comprising a control unit and a local area network port;
the local area network port of the slave device being connected with the control unit of the slave device;
a local area network transmission interface;
one end of the local area network transmission interface being connected to the local area network port of the master device;
and

another end of the local area network transmission interface being connected to the local area network port of the slave device
for connecting the master device and the slave device.

US Pat. No. 9,801,292

COUPLING AND FIXING STRUCTURE OF POWER MODULE AND CASING OF POWER SUPPLY

CHYNG HONG ELECTRONIC CO....

1. A coupling and fixing structure of a power supply comprising:
a casing;
a power module;
the casing comprising a first bottom board, a first raised stud, a second raised stud, a first locking member and a second
locking member;

the first bottom board comprising a top surface, a front side and a rear side;
the top surface being formed in between the front side and the rear side;
the first raised stud being disposed on the top surface and located adjacent to the front side;
the second raised stud being disposed on the top surface and located adjacent to the rear side;
the first raised stud being interlocked with the first locking member;
the second raised stud being interlocked with the second locking member;
the power module comprising a second bottom board, a positioning recess and a positioning hole;
the second bottom board comprising an upper surface, a lower surface, a first side and a second side;
the upper surface and the lower surface being formed opposite to each other;
the upper surface and the lower surface being formed in between the first side and the second side;
the first side corresponding to the front side;
the second side corresponding to the rear side;
the positioning recess penetrating through the upper surface and the lower surface and being located adjacent to the first
side;

the positioning hole penetrating through the upper surface and the lower surface and being located adjacent to the second
side;

the positioning recess corresponding to the first raised stud;
the positioning recess extending outward toward the first side and being gradually enlarged to form an enlarged opening;
the positioning hole corresponding to the second raised stud;
the positioning hole being an elongated hole;
the positioning hole comprising a positioning portion;
the positioning portion being located opposite to the positioning recess and extending toward the first side;
the first raised stud being accommodated within the enlarged opening and the second raised stud being inserted into the positioning
hole in response to the power module being assembled to the casing;

the power module being slightly moved toward the front side through guidance of the positioning portion so as to insert the
first raised stud into the positioning recess in response to the first raised stud being accommodated within the enlarged
opening and the second raised stud being inserted into the positioning hole;

the first raised stud and the second raised stud being respectively locked by the first locking member and the second locking
member in response to the power module being slightly moved toward the front side through guidance of the positioning portion
so as to insert the first raised stud into the positioning recess;

the first raised stud and the second raised stud each being a screw; and
the first locking member and the second locking member each being a nut.

US Pat. No. 9,787,189

MULTIPHASE DC POWER SUPPLY WITH HIGH SWITCHING FREQUENCY

CHYNG HONG ELECTRONIC CO....

1. A multiphase DC power supply with high switching frequency comprising three parallel connected three phase DC power supply
characterized in each of said parallel connected three phase DC power supply comprises:
a boost power factor corrector to convert an AC power source to a rectified and a filtered DC voltage;
an isolation transformer connected to the boost power factor corrector to
generate a full wave rectified DC voltage having a stable voltage level;
a duck switching circuit consisting a first, a second and a third semiconductor switches to regulate the voltage level of
an output of said isolation transformer and each generate an output of switching frequency between 110 KHz and 150 KHz; and

a phase controller to manage an interleaved phase of the output of said three semiconductor switches.

US Pat. No. 9,674,973

COUPLING AND FIXING STRUCTURE OF PANEL AND CASING OF POWER SUPPLY

CHYNG HONG ELECTRONIC CO....

1. A coupling and fixing structure of a panel and a casing of a power supply, characterized by:
one side of the casing having an opening, the casing having a plurality of penetrating holes close to the opening, the penetrating
holes being defined as first penetrating holes, second penetrating holes and third penetrating holes, the first penetrating
holes and the third penetrating holes being disposed at a top side of the casing, the second penetrating holes being disposed
at left and right sides of the casing, a bottom side of an inner wall of the casing, close to the opening, being provided
with a plurality of first raised studs and a plurality of second raised studs;

the power supply further comprising a frame, the frame having a plurality of first through holes and a plurality of second
through holes corresponding to the first penetrating holes and the second penetrating holes respectively, the frame having
a plurality of first positioning holes corresponding to the first raised studs of the casing, a circumferential edge of the
frame being formed with a plurality of first notches and a plurality of second notches corresponding to the third penetrating
holes and the second raised studs of the casing;

the panel being provided with a plurality of connecting pieces and a plurality of positioning pieces corresponding to the
first notches and the second notches, the connecting pieces having third through holes corresponding to the third penetrating
holes of the casing, the positioning pieces having second positioning holes corresponding to the second raised studs of the
casing, left and right sides of the panel being provided with a plurality of first threaded holes and retaining plates, the
retaining plates each having an L-like shape, one end of each retaining plate having a plurality of second threaded holes
corresponding to the second through holes of the frame, another end of each retaining plate having a plurality of third threaded
holes corresponding to the first threaded holes of the panel, the retaining plates being locked to the panel through screws;

wherein when the panel is secured to the casing, the frame is first positioned and engaged at an inner side of the opening
of the casing, and then the panel is locked to the casing through the retaining plates.

US Pat. No. 9,748,055

OUTPUT-SWITCH CONTROL SYSTEM FOR AC-DC POWER SUPPLY

CHYNG HONG ELECTRONIC CO....

1. An output-switch control system for an AC-DC power supply, the output-switch control system comprising:
a push-button switch;
the push-button switch comprising a lengthwise button, a first trigger, a second trigger, a first spring member and a second
spring member;

the first trigger and the second trigger being connected to the lengthwise button;
the first spring member being biased against the first trigger;
the second spring member being biased against the second trigger;
the lengthwise button being configured as a self-return button via the first spring member and the second spring member;
a detecting circuit;
the detecting circuit comprising a first contact and a second contact;
the first contact and the first trigger corresponding to each other;
the second contact and the second trigger corresponding to each other;
the first trigger being capable of separating from the first contact through the first spring member being biased against
the first trigger;

the second trigger being capable of separating from the second contact through the second spring member being biased against
the second trigger;

the first trigger being capable of abutting against the first contact through the lengthwise button being pressed;
the second trigger being capable of abutting against the second contact through the lengthwise button being pressed;
the detecting circuit outputting a power-source-on signal in response to the first trigger abutting against the first contact
and the second trigger abutting against the second contact at a first time, and thereafter outputting a power-source-off signal
after outputting the power-source-on signal in response to the first trigger abutting against the first contact and the second
trigger abutting against the second contact at a second time after the first time; and

the detecting circuit outputting the power-source-off signal without outputting the power-source-on signal in response to
the first trigger abutting against the first contact and the second trigger separating from the second contact, or in response
to the first trigger separating from the first contact and the second trigger abutting against the second contact.

US Pat. No. 10,063,038

PROGRAMMABLE AC POWER DISTRIBUTION UNIT

CHYNG HONG ELECTRONIC CO....

1. A programmable AC power distribution unit, comprising:a case, placed on a rack, the case having an accommodation space therein;
a panel, disposed at a front of the case, the panel being provided with a main switch, an emergency switch and a display screen, the main switch, the emergency switch and the display screen being electrically connected, the main switch being electrically connected in series with the emergency switch;
a front plate, disposed behind the panel and parallel to the panel, the front plate being located in the accommodation space of the case, the front plate including an insulating plate, the insulating plate having a plurality of first perforations at a middle portion thereof;
a back plate, disposed at a rear of the case, the back plate being parallel to the panel and the front plate, the back plate being provided with a plurality of output terminals, the back plate having a plurality of second perforations corresponding to the first perforations of the insulating plate, a portion of the back plate, where the second perforations are located, being made of an insulating material;
a bus bar assembly, having a first end transversely inserted through the first perforations and a second end inserted through the second perforations, the bus bar assembly being located in the accommodation space of the case, the second end of the bus bar assembly extending out of the back plate for connection of an external power supply;
a plurality of current detectors, fitted on the bus bar assembly, the plurality of current detectors being electrically connected with the panel respectively for detecting input current;
a plurality of electromagnetic switches, disposed in the accommodation space of the case and located at left and right sides of the bus bar assembly respectively, input ends of the electromagnetic switches being electrically connected with the bus bar assembly respectively, output ends of the electromagnetic switches being electrically connected with the output terminals of the back plate; and
a network connection and power parameter measuring circuit board, disposed at one side of the case, the network connection and power parameter measuring circuit board being electrically connected with the panel, the current detectors and the electromagnetic switches for measuring various power values of the external power supply.

US Pat. No. 9,632,548

STRUCTURE OF POWER INPUT END AND POWER OUTPUT END OF POWER SUPPLY DEVICE

CHYNG HONG ELECTRONIC CO....

1. An improved structure of a power input end and a power output end of a power supply device, the power supply comprising
a casing and a main body, a rear side of the casing being longitudinally provided with a back plate, the main body being disposed
in the casing, characterized by:
the back plate having a plurality of first heat dissipation holes, the back plate further having an input hole and an output
hole close to the first heat dissipation holes;

at least one power input unit, the power input unit comprising a protection cover, at least one L-shaped plate, and a power
input end, one end of the L-shaped plate and the power input end being jointly disposed at one side of an inner wall of the
casing, the power input end extending out of the input hole of the back plate, the power input end being electrically connected
with the main body, the protection cover being provided with an upright plate parallel to the back plate, the upright plate
having at least one threaded hole for another end of the L-shaped plate to be screwed therein, the protection cover being
adapted to cover the power input end;

at least one power output unit, the power output unit comprising at least one power output end, the power output end being
in the form of a plate and disposed in the casing, the power output end being electrically connected with the main body, the
power output end being perpendicular to the back plate and extending out of the output hole of the back plate.

US Pat. No. 10,062,491

CHOKE COIL MODULE OF HIGH POWER DENSITY DC-AC POWER INVERTER

CHYNG HONG ELECTRONIC CO....

1. A choke coil module of a high power density DC-AC power inverter, the power inverter comprising a casing, the choke coil module being disposed in the casing, two sides of the casing being formed with a plurality of air inlets and a plurality of air outlets respectively, one of the two sides of the casing being provided with a fan unit for guiding outside air into the casing via the air inlets, the air being expelled via the air outlets, the choke coil module comprising:a bottom plate, transversely disposed on a bottom of the casing, the bottom plate being fixedly connected to the bottom of the casing through a plurality of support posts, a gap being formed between the bottom plate and the bottom of the casing, the bottom plate being formed with a plurality of first heat radiating holes;
at least one upright post, longitudinally disposed on the bottom plate, the upright post having two symmetrical planes, the planes being longitudinal tangential planes of two sides of the upright post;
at least one choke coil, fitted on the upright post, a heat radiating space being defined between an inner annular wall of the choke coil and the planes of the upright post, the heat radiating space being located above the first heat radiating holes;
a top plate, disposed on top of the upright post, the top plate and the bottom plate being configured to clamp the choke coil through the upright post, the top plate being formed with a plurality of second heat radiating holes corresponding to the first heat radiating holes of the bottom plate, the first heat radiating holes, the second heat radiating holes and the heat radiating space being communicated with one another to form an air guide passage;
wherein when the power converter is actuated, the choke coil generates heat, through the fan unit, the outside air is guided into the casing via the air inlets of the casing, and the heat generated by the choke coil is expelled via the air outlets of the casing.

US Pat. No. 10,123,442

HIGH POWER DENSITY POWER SUPPLY

CHYNG HONG ELECTRONIC CO....

1. A high power density power supply, comprising a casing, the casing having a panel at a front side thereof, characterized in that the high power density power supply further comprises a plurality of power modules, a first filter circuit board and a plurality of second filter circuit boards;the power modules are arranged side by side in the casing in a direction perpendicular to the panel, a front side of each of the power modules is provided with a cooling fan;
the first filter circuit board is disposed in the casing and located in front of the cooling fans of the power modules, the first filter circuit board includes a first filter thereon;
the second filter circuit boards are disposed in the casing, the second filter circuit boards are fixedly connected to top ends of the cooling fans of the power modules respectively, a second filter is disposed beneath each of the second filter circuit boards, one side of each of the second filter circuit boards, facing the first filter circuit board, is provided with a plurality of first conductive plates extending downward, bottoms of the first conductive plates are fixedly connected to the first filter circuit board so that the second filter circuit boards are electrically connected to the first filter circuit board, another side of each of the second filter circuit boards, facing a corresponding one of the power modules, is provided with a plurality of second conductive plates extending downward, and bottoms of the second conductive plates are fixedly connected to the corresponding power modules so that the second filter circuit boards are electrically connected to the corresponding power modules respectively.